It may be looking for a morph you don't have - for example, if you don't have the Evolution moprhs there may be a lot of morphs in the clothing that won't connect. If so it's not a problem, it just means that there's a morph in the clothing that isn't needed.

thank you , Bejaymac I hope more stuff will get DSON format soon it's much better :)

EDIT: just tried

SciFi Renegade - 14468_SciFiRenegade_1.3_trx.exe

SciFi Renegade Textures - 14587_SciFiRenegadeTextures_1.1_ds.exe

they are not DSON files ,but they come with the meta data already included in the TRX -this time the message did not show in the log file
so I think it mostly happens with files where you install the meta data apart from the file.